This just turned up in my BBC news feed today... a short video showing what's happening with the Anglican Cathedral in the city centre.
https://www.bbc.com/news/av/world-55256198 The city's Catholic cathedral is being deconstructed and rebuilt on another site: https://www.rnz.co.nz/news/national/405016/new-catholic-cathedral-part-of-500m-christchurch-development Cheers, Dave > On Dec 9, 2020, at 8:22 PM, David Mann <dmann...@gmail.com> wrote: > > On Dec 9, 2020, at 6:26 AM, John <jsessoms...@nc.rr.com> wrote: > >> I wonder if they could have made the new more earthquake resistant? I'm >> pretty sure architects & engineers knew the principles back in the 80s. > > Yes they did (spurred by the Napier earthquake in 1931*), but the earthquake > building standards are more about making sure the occupants can evacuate > safely. I think only three of the modern buildings in the city failed that > standard. Two total collapses and one where the internal stairway collapsed, > leaving some people stranded. The longer-term fate of the building can be > considered during its design but the construction costs go up substantially, > so it's generally only critical facilities such as hospitals that were built > to remain operational. > > There have been new innovations coming out such as reinforcing which is > designed to absorb energy and fail at a known point (rather like a fuse) > which can be made easily replaceable. I've seen base isolation being used in > some new buildings (the technology was invented here in the 1970s, but it > costs money). Keeping occupants alive while they get out is a good start, > but replacing an entire CBD is pretty time-consuming and expensive, nevermind > the disruption. > > * https://teara.govt.nz/en/historic-earthquakes/page-8 > > Cheers, > Dave > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
